/****************************************************************************
 *
 * Copyright 2016 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 ****************************************************************************/
/****************************************************************************
 * drivers/usbdev/composite_desc.c
 *
 *   Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <tinyara/config.h>

#include <sys/types.h>

#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <debug.h>

#include <tinyara/usb/usbdev_trace.h>

#include "composite.h"

#ifdef CONFIG_USBDEV_COMPOSITE

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/****************************************************************************
 * Private Types
 ****************************************************************************/

#ifdef CONFIG_USBDEV_DUALSPEED
typedef int16_t(*mkcfgdesc)(FAR uint8_t *buf, uint8_t speed, uint8_t type);
#else
typedef int16_t(*mkcfgdesc)(FAR uint8_t *buf);
#endif

/****************************************************************************
 * Private Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Private Data
 ****************************************************************************/
/* Device Descriptor */

static const struct usb_devdesc_s g_devdesc = {
	USB_SIZEOF_DEVDESC,			/* len */
	USB_DESC_TYPE_DEVICE,		/* type */
	{							/* usb */
		LSBYTE(0x0200),
		MSBYTE(0x0200)
	},
#ifdef CONFIG_COMPOSITE_IAD
	USB_CLASS_MISC,				/* classid */
	2,							/* subclass */
	1,							/* protocol */
#else
	USB_CLASS_PER_INTERFACE,	/* classid */
	0,							/* subclass */
	0,							/* protocol */
#endif
	CONFIG_COMPOSITE_EP0MAXPACKET,	/* maxpacketsize */
	{
		LSBYTE(CONFIG_COMPOSITE_VENDORID),	/* vendor */
		MSBYTE(CONFIG_COMPOSITE_VENDORID)
	},
	{
		LSBYTE(CONFIG_COMPOSITE_PRODUCTID),	/* product */
		MSBYTE(CONFIG_COMPOSITE_PRODUCTID)
	},
	{
		LSBYTE(CONFIG_COMPOSITE_VERSIONNO),	/* device */
		MSBYTE(CONFIG_COMPOSITE_VERSIONNO)
	},
	COMPOSITE_MANUFACTURERSTRID,	/* imfgr */
	COMPOSITE_PRODUCTSTRID,		/* iproduct */
	COMPOSITE_SERIALSTRID,		/* serno */
	COMPOSITE_NCONFIGS			/* nconfigs */
};

/* Configuration descriptor for the composite device */

static const struct usb_cfgdesc_s g_cfgdesc = {
	USB_SIZEOF_CFGDESC,			/* len */
	USB_DESC_TYPE_CONFIG,		/* type */
	{
		LSBYTE(COMPOSITE_CFGDESCSIZE),	/* LS totallen */
		MSBYTE(COMPOSITE_CFGDESCSIZE)	/* MS totallen */
	},
	COMPOSITE_NINTERFACES,		/* ninterfaces */
	COMPOSITE_CONFIGID,			/* cfgvalue */
	COMPOSITE_CONFIGSTRID,		/* icfg */
	USB_CONFIG_ATTR_ONE |		/* attr */
	COMPOSITE_SELFPOWERED | COMPOSITE_REMOTEWAKEUP,
	(CONFIG_USBDEV_MAXPOWER + 1) / 2	/* mxpower */
};

#ifdef CONFIG_USBDEV_DUALSPEED
static const struct usb_qualdesc_s g_qualdesc = {
	USB_SIZEOF_QUALDESC,		/* len */
	USB_DESC_TYPE_DEVICEQUALIFIER,	/* type */
	{							/* usb */
		LSBYTE(0x0200),
		MSBYTE(0x0200)
	},
	USB_CLASS_VENDOR_SPEC,		/* classid */
	0,							/* subclass */
	0,							/* protocol */
	CONFIG_COMPOSITE_EP0MAXPACKET,	/* mxpacketsize */
	COMPOSITE_NCONFIGS,			/* nconfigs */
	0,							/* reserved */
};
#endif

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: composite_mkstrdesc
 *
 * Description:
 *   Construct a string descriptor
 *
 ****************************************************************************/

int composite_mkstrdesc(uint8_t id, struct usb_strdesc_s *strdesc)
{
	const char *str;
	int len;
	int ndata;
	int i;

	switch (id) {
	case 0: {
		/* Descriptor 0 is the language id */

		strdesc->len = 4;
		strdesc->type = USB_DESC_TYPE_STRING;
		strdesc->data[0] = LSBYTE(COMPOSITE_STR_LANGUAGE);
		strdesc->data[1] = MSBYTE(COMPOSITE_STR_LANGUAGE);
		return 4;
	}

	case COMPOSITE_MANUFACTURERSTRID:
		str = g_compvendorstr;
		break;

	case COMPOSITE_PRODUCTSTRID:
		str = g_compproductstr;
		break;

	case COMPOSITE_SERIALSTRID:
		str = g_compserialstr;
		break;

	case COMPOSITE_CONFIGSTRID:
		str = CONFIG_COMPOSITE_CONFIGSTR;
		break;

	default:
		return -EINVAL;
	}

	/* The string is utf16-le.  The poor man's utf-8 to utf16-le
	 * conversion below will only handle 7-bit en-us ascii
	 */

	len = strlen(str);
	for (i = 0, ndata = 0; i < len; i++, ndata += 2) {
		strdesc->data[ndata] = str[i];
		strdesc->data[ndata + 1] = 0;
	}

	strdesc->len = ndata + 2;
	strdesc->type = USB_DESC_TYPE_STRING;
	return strdesc->len;
}

/****************************************************************************
 * Name: composite_getepdesc
 *
 * Description:
 *   Return a pointer to the raw device descriptor
 *
 ****************************************************************************/

FAR const struct usb_devdesc_s *composite_getdevdesc(void)
{
	return &g_devdesc;
}

/****************************************************************************
 * Name: composite_mkcfgdesc
 *
 * Description:
 *   Construct the configuration descriptor
 *
 ****************************************************************************/

#ifdef CONFIG_USBDEV_DUALSPEED
int16_t composite_mkcfgdesc(uint8_t *buf, uint8_t speed, uint8_t type)
#else
int16_t composite_mkcfgdesc(uint8_t *buf)
#endif
{
	int16_t len;
	int16_t total;

	/* Configuration descriptor -- Copy the canned configuration descriptor. */

	memcpy(buf, &g_cfgdesc, USB_SIZEOF_CFGDESC);
	total = USB_SIZEOF_CFGDESC;
	buf += USB_SIZEOF_CFGDESC;

	/* Copy DEV1/DEV2 interface descriptors */

#ifdef CONFIG_USBDEV_DUALSPEED
	len = DEV1_MKCFGDESC(buf, speed, type);
	total += len;
	buf += len;
	total += DEV2_MKCFGDESC(buf, speed, type);
#else
	len = DEV1_MKCFGDESC(buf);
	total += len;
	buf += len;
	total += DEV2_MKCFGDESC(buf);
#endif

	DEBUGASSERT(total == COMPOSITE_CFGDESCSIZE);
	return total;
}

/****************************************************************************
 * Name: composite_getqualdesc
 *
 * Description:
 *   Return a pointer to the raw qual descriptor
 *
 ****************************************************************************/

#ifdef CONFIG_USBDEV_DUALSPEED
FAR const struct usb_qualdesc_s *composite_getqualdesc(void)
{
	return &g_qualdesc;
}
#endif

#endif							/* CONFIG_USBDEV_COMPOSITE */
